Detention and deportation are the two most extreme sanctions of an "immigration penality" that enforces borders, polices non-citizens, identifies those who are undesirable, and refuses them entry or casts them out. As such, they are constitutive practices that work to make up and regulate borders, citizens, and populations. "Securing Borders" is a close study of the discursive formations, transformations, and technologies of power that have surrounded the laws, policies, and practices of detention and deportation in Canada since the Second World War. Pratt traces the connections between what might appear to be rather disparate concerns - detention and deportation, criminal justice, welfare, refugees, law, discretion, security, and risk - and considers these in relation to more general transitions from welfare to neoliberal modes of rule. "Securing Borders" is a rich interdisciplinary study which promises to be of interest to scholars in a range of disciplines including criminology, socio-legal studies, law, history, sociology, political science, international relations, and public administration. It will also be of interest to non-governmental advocates as well as to government representatives who work in the areas of immigration, refugee determination, and related fields.